Automatic valve-milling machine



(No Model.) 2 Sheets-Sheet 1. J. G. OLIVER & G. C. BARDONS. AUTOMATICVALVE MILLING MACHINE- No. 555,116. Patented Feb. 25, 1896.

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J. G. OLIVER & G. O. BARDONS. AUTOMATIC VALVE MILLING MACHINE.

No. 555,116. Patented Feb. 25, 1896.

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NiTED STATES PATENT OFFTQE.

JOHN G. OLIVER AND GEORGE O. BARDONS, OF CLEVELAND, OHIO.

AUTOMATIC VALVE-MILLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 555,116, dated February25, 1896.

Application filed October 22, 1894. Serial No. 526,657. (No model.)

To aZZ- whom it may concern:

Be it known that we, JOHN G. OLIVER and GEORGE C. BARDONS, citizens ofthe United States, residing at Cleveland, in the county of Ouyahoga andState of Ohio, have invented certain new and useful Improvements inAutomatic Valve-Milling Machines; and we do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

Our invention relates to improvements in automatic valve-millin gmachines and it consists substantially of a work-holder slide, a pair ofrotative cutters, mechanism for moving the work-holder and rotating thework on the holder and passing the same between the cutters, also ofautomatic means whereby the work-holding slide is stopped when the workis completed.

Figure l is a front elevation. Fig. 2 is a top plan view. Fig. is an endelevation. Fig. l is a detail end elevation of the automatic stop forthe work-holder slide. Fig. 5 is a plan view of the work-releasingmechanism. Fig. 6 is a diagrammatic elevation of a part of the machinein cross-section. Fig. 7 is a detail view of the means for rotating theworkholder. Fig. Sis an elevation in section of Fig. 7.

A suitable standard or hollow column A is provided, which has transverseways upon its upper face wherein the work-holding slide 13 is placed andwherein it is reciprocated. Upon each side of this slide there are theheads 0, which can be adjusted by the screws 0. These heads carry thespindles c, which have mounted thereon the pulleys c and the cutters Theright-hand side head has an extensionspindle which connects with thework-holderslide-actuating mechanism.

The slide 13 is moved in a rearward direction by reason of the cam D andin its forward movement it is actuated by the weight E, suspended fromcable e, which passes over a suitable sheave e and is attached to theslide in any convenient manner. These parts may,however,be reversed-thatis, the weight might move the slide rearwardly and the cam in itsforward direction, or the movement of the slide might be made positivein both directions by a grooved cam or in any other suitable manner, ifsuch were desired. It should be understood that we do not limitourselves to the specific details as shown. The slide carries awork-holder B at its forward end, which holds the work in a movablemanner, so that it is readily replaced. The work-holder B is adjustablein a vertical direction and is held by a lock-nut b. It is also rotatedperiodically by a ratchet b which is engaged by a pawl 11 that is heldby the frame. This pawl has a slight horizontal movement against thetension of a suitable spring so as to keep it engaged with theratchet-teeth.

In order that the work may be held firmly in position while it is beingmilled, we provide a looking-disk I), placed upon the workholder spindlejust above the ratchet-wheel b. This disk has notches b the same innumber as the teeth of the ratchet-wheel. \Ve also provide aspring-pressed bolt Z) for engaging the notches and a trip I), which asthe slide moves forward engages a second trip I) on the frame, thuswithdrawing the bolt, so that the ratchet-wheel which is secured to thework-holder spindle I) can turn the work, which as soon as it has movedthe proper distance is again locked by the bolt mentioned.

The spindle c at the right-hand end has a pulley 0 which connects with abelt 0 to a second pulley which is secured to the short shaft o Thisshaft is supported by the bearing 0 and it carries a bevel-gear a whichmeshes with another bevel-gear 0 secured to the rearwardly-extendingshaft 0 The shaft 0 at its front end has bearing in a pivoted bracketwhich is supported upon the shaft 0 between the bearing a and thebevelgear a The shaft c extends rearwardly where it ICO this form theslide moves rearward three times, when all six faces will be completed.

In order to stop the slide automatically after the third movement, weplace a small pini011 f on the shaft F and meshing therewith, aspur-gear f supported upon a bearingbraeket extending rearwardly fromthe machine-frame, whereby the pinion makes three revolutions to one ofthe spur-gear. The short spur-gear shaft carries a finger f 3 whichengages a gravity-catch f having a depending hook-ended projection whichserves to hold the bearing of the shaft 0 through a hook projection fromthis bearing, so that the worm and gear are all held in mesh. As thecatch is disengaged the bearing drops by gravity, disengaging the wormand thus stopping the slide. The bearing drops upon a bell-crank lever fwhich is held at a predetermined position by a pin f \Vhen the machineis to be started up again the bell-crank f is rocked bya hand-rod f.This raises the bearing 0 and the shaft 0 whereby the worm e engages theworm-gear c and also allows the depending hook of the gravity-catch todrop in place under the hook of the bearing 0 thus holding these partsengaged until again to be released, when the operation will be the sameas already described.

It is obvious that with a change of gears we could automaticallyregulate this stop-motion for squares or octagons or any other number offaces. Therefore we do not limit ourselves to the specific ratiomentioned. 'Of course the parts Z1 1) would be changed accordingly. \Vecould also inclose all of the working parts outside of the slide insuitable housings, as desired. The work is held in place by a hand wheelor lever which is quickly loosened, so that a new piece may be placedupon the machine.

ln practice we place a series of machines side by side, so that as oneis being supplied with work the others are active, thus turning outamaximum product with minimum cost of plant and labor.

It should also be understood that we do not limit ourselves to the useof a pair of cutters, whether placed upon the same axial plane orotherwise, for it is obvious that a single cutter, or more thantwo,would operate all right,

' turning out work at various speeds.

The cutters could also be placed in advance of each other along the pathof travel of the slide, and the work-holder could be moved so as topresent a new face to each succeeding cutter, if such arrangement ofparts were desired,or, furthermore, for finely-finished work the slidewould successively pass adjacent succeeding cutters without being moved,thus subjecting the work to more than one operation upon any face, ifsuch were desired. Of course the work could be passed between a pair ofcutters more than once without changing the position of the same, thusin a measure effecting the same end.

It is of course obvious that the work-holder could be moved at each endof the movement of the slide, so that the cutters would be operativeupon the faces of the work as the slide moves in each direction.

\Vhat we claim is l. A movable slide and an automaticallyindexing work-holder, carried thereby and means for automatically moving the slide,substantially as set forth.

2. A movable slide and an automaticallyindexing work-holder, carriedthereby, means for automatically moving the slide and means forautomatically stopping the slide when desired, substantially as setforth.

3. A movable slide and support, a workholder on such slide comprising aspindle capable of rotary and endwise movement a ratchet connectedtherewith, a dog pivotally secured to the slide-support, a lockingmember adapted to hold the spindle from rotation and means for releasingthe locking device as the dog actuates the ratchet to rotate thespindle, and again engage the same after the ratchet has been moved,substantially as set forth.

at. In milling-machines the combination of a reciprocating work-holdingslide with a movable work-holder capable of a rotaryand endwise movementsupported thereon, a loeking member for maintaining the holder againstrotation, a dog or pawl for rotating the same and means for makingeither one of the last two members inoperative while the other is inoperation, substantially as specified.

5. In milling-machines the combination of a reciprocating work-holdingslide, with a cam for moving the same a weight spring or the like towork in opposition to the cam, a revoluble work-holder on the slide, abed or frame in which the slide moves, a stop or pawl secured tosuch'bed for rotating the holder and a pawl or tripping mechanism alsosecured on such bed, the same being adapted to unlock the rotatingholder only during the time the rotating pawl is in action,substantially as specified.

6. In milling-machines, the combination of a movable slide, a rotatingwork-holder supported thereby, a bed in which the slide is adapted tomove, with a periodically-actuating cam, a weight or the like to work inopposition to the cam and intermittent power connections for rotatingthe cam, substantially as specified.

7. In milling-machines the combination of a pair of adjacent cutters andpower connections therefor with a reciprocating slide, a work-holderthereon, a cam or the like for moving the slide in one direction, meanseX- ternal of the power connections for moving the slide in an oppositedirection, a shaft for rotating the cam, a detachable power-shaftoperating with the cam-shaft,a tripping mechanism actuated by thecam-shaft to detach the power-shaft at predetermined periods,substantially as specified.

8. In milling-machines the combination of a power-shaft of a cuttingmechanism, a supplementary shaft, a pivoted bearing therefor whereby theone end of the shaft may be moved in a direction other than rotarily abearing at the free end of the shaft, a movable catch or stop adapted tohold the free end of the shaft in a fixed position, with a movablework-holding slide and periodic power connections between the pivotedshaft and such slide, substantially as specified.

9. In a movable slide, periodic power con nections for moving the samein one direction and a weight spring or the like for moving the same inan opposite direction, a suitable frame support for the slide andactuating mechanism, a movable work-holder a stop on the frame supportfor moving the work-holder at the end of each to-and'fro movement of theslide.

10. In milling-machines, the combination of a frame a pair ofcutter-supports rotating cutters in the supports and means for rotatingthe same, with a work-holding slide, a workholder upon the slide, a camfor moving the slide in one direction, a weight or the like for movingit in an opposite direction a locking member adapted to hold thework-holder against rotation, a fixed pawl forrotating the holder and atrip for releasing the locking member during the time the pawl moves itinto a new position, substantially as specified.

In testimony whereof we affix our signatures in presence of twowitnesses.

JOHN G. OLIVER. GEORGE O. BARDONS. \Vitnesses N. S. AMsTUTz, Gno. H.SCHWAN.

